Poor thing, at least he gave that guy a taste of his own medicine before being put down ( as I'm sure he was after this event).
I heard he might have had rabbies ( I could be wrong, I think I read it in the comments or something ) but if he didn't, I have no doubts that the person being attacked was 100% at fault.
" If the entire world was one big machine, I couldn't be an extra part. I had to be here for some reason." ~ Hugo Cabret